Lyric discussion by Jate 

Cover art for Breakthrough lyrics by Modest Mouse

I heard a live show in which Isaac during the "breakthrough" parts replaced "it" with "me". I think this song is about someone who became very introverted after a disastrous wedding (probably the person was stood up). However, beneath the mild outer shell (partially created by this shell) is a very angry, mindless man who is trying to break through the shell.